Modified nose assembly



1963 G. J. VAN HECKE ETAL 3,

MODIFIED NOSE ASSEMBLY Filed Oct. 5, 1961 4; 7/ 5 A 'f l 7 1; 2:1 r? ,141; m

, {a /M" i i1 14 1' 4d Z3 1 INVENTORS 1 .3. Gear e J7 1 472 f/eal'a/United States Patent 3,167,806 MQDEED N (ESE ASSEMEBLY George J. VanHecke, Detroit, and Robert A. Smoot, Dear-horn, Micln, assignors to HuckManufacturing Company, Detroit, Mich, a corporation of Michigan FiledOct. 5, 1961, Sier. No. 143,208 4 Claims. (Cl. 213-42) This inventionrelates to apparatus for setting a fastener.

More specifically, this invention pertains to apparatus for setting afastener of the type comprising a pin having a plurality of lockinggrooves located thereon and a collar or sleeve which is to be swagedonto the pin with material flowing into the locking grooves. At times,difiiculty has been encountered in attempting to remove the anvil usedto swage the collar from the swaged collar; there fore it is an objectof this invention to provide apparatus for setting a rivet of the abovedescribed type having means for ejecting the anvil from the swagedcollar of the fastener.

In apparatus for setting fasteners of the above described type, a noseassembly is used which houses the anvil member and also the means forgripping the pin of the fastener. In practice, the nose assembly of theapparatus is moved by the operator to accept a new fastener withoutregard as to the position of the internal means (to be described) whichgrip the pin of the fastener. With apparatus as presently constructed,the pin of the fas tener is sometimes inserted into the nose assembly ofthe apparatus at an angle relative to the anvil member and the means forgripping the pin, such that as the means for gripping the pin movesaxially to accept the new fastener the angled pin is jammed in the noseassembly thereby causing damage to the apparatus. Therefore, it isanother object of this invention to provide a novel construction forapparatus for setting fasteners of the above described type in whichdamage to the apparatus by the insertion of the pin of the fastenerangularly within the nose assembly of the apparatus is made completelyimpossible.

Other objects, features, and advantages of the present invention willbecome apparent from the subsequent description and the appended claims,taken in conjunction with the accompanying drawings, in which:

FIGURE 1 is an enlarged longitudinal sectional view of a nose assemblyembodying the features of this invention;

FIGURE 2 is a sectional view of a part of the nose assembly of FIGURE 1shown in relation to a fastener to be set; and

FIGURE 3 is a sectional view similar to that of FIG- URE 2 in which thesetting of the fastener has been partially completed.

Looking now to FIGURE 1, a pull gun assembly generally indicated by thenumeral comprises a pull gun member 11 partially shown in phantom lines,which is operable with a nose assembly 12 for setting a fastener 14(FIGURE 2) disposed in aligned bores in a pair of workpieces 16 and 18.The pull gun member 11 is of a conventional type capable of applying arelative axial force such as described in the patent to L. C. Huck, No.2,132,112.

The nose assembly 12 comprises a generally tubularly shaped external orouter anvil member 20 having an axially extending bore 21 and havingradially extending ears or lugs 22 located near one end for lockableengagement with the end of the casing of the gun member 11 by meansknown to the art. The end of the outer anvil 20 secured to the gunmember 11 is open while the opposite or forward end is substantiallyclosed by an "Ice anvil portion 24 having a centrally disposed bore oraperture 26 located therein. The aperture 26 can have a variety ofshapes to facilitate swaging and can be constructed of a shape wellknown in the art. A generally tubular sleeve or stop member 25 ismatably disposed within the bore 21 at the rear or open end of the outeranvil member 20. Note that the tubular stop member 25 is restrained fromfurther axial rearward movement by the casing of the pull gain 11.Disposed within the outer anvil 24 at the forward portion of the bore 21is a generally tubularly shaped collar ejector member 28. The collarejector member 28 is slidable axially within the bore 21 and has an openend adjacent to and abutable with the stop member 25 and has itsopposite or forward end substantially closed and terminating in anaxially outwardly extending tubular ejector nose portion 30. The ejectornose portion 30 has an outside diameter in clearance relationship withthe diameter of the rear portion of the bore 26 such that the noseportion 30 is movable axially therein. The nose portion 30 also has acentrally disposed bore 32 extending therethrough. When the collarejector member 28 is moved axially to its forwardmost position in thebore 21, the nose portion 30 extends completely within the bore 26 and aforward face 34 of the collar ejector member 23 is engaged with a rearsurface 36 of the front portion 24 of the outer anvil member 20. A lostmotion gap or axial space 33 is provided between the stop member 25 andthe ejector member 28 and is of a dimension relative to the axial lengthof the nose portion 30 for a purpose to be described.

Slidably disposed within the collar ejector member 28 and within thestop member 25 is a generally tubularly shaped collet member 40 whichhas an axial bore 42 extending therethrough which is threaded at an openor rear portion 43. The rear portion 43 of the collet member 49 isthreadably engaged with a threaded portion 27 of a piston (not shown) ofthe pull gun 11 and terminates at its opposite or forward end in anaxially outwardly radially inwardly tapered bore 44. The bore 42 isrelieved radially outwardly for a portion 47 axially adjacent to thetapered bore 44 for a purpose to be described. A chuck jaw assembly 46comprises a plurality of individual chuck jaws which define a frustoconically inclined surface which is matable within the tapered bore 44.The individual jaw members of the chuck jaw assembly 46 are urgedradially inwardly by means of an O-ring member 50 disposed in anexternal circumferentially extending slot 52. The individual members ofthe chuck jaw assembly 46 define an axially extending aperture and eachhas a plurality of teeth 54 extending radially inwardly into theaperture to serve a purpose to be described.

Bearing axially against the rear surface of the chuck jaw assembly 46 isa generally circularly shaped chuck jaw follower cap and O-ring assembly56. A generally tubularly shaped chuck jaw follower member 58 has itsforward end bearing axially against the O-ring of the follower cap andO-ring assembly 56 and in turn is urged axially forwardly by means of acoil spring member 60 which bears against the opposite or rear end ofthe chuck jaw follower member 56. The opposite or rear end of the spring60 bears against an annular flange portion 61 of a generally tubularlyshaped chuck jaw follower sleeve member 62 which has a body portion 63telescopically disposed within the chuck jaw follower member 58. Sincethe flange portion 61 is in abutment with the threaded portion 27 of thepiston member of the pull gun 11, the coil spring member 60 thus urgesthe chuck jaw follower member 58 axially forwardly into engagement withthe chuck jaw follower cap and O-ring assembly 56, which in turn thenurges the chuck jaw assembly 46 axially outwardly or forwardly into thetapered bore 44.

Looking now to FIGURE 2, a fastener 14- of the type to be set by thepull gun assembly 16 comprises a tubular sleeve member 64 having asleeve portion 65 extending through and beyond aligned bores in a pairof plates 16 and 13 and has a collar portion 66 in abutment with thefront plate 18. A pin member 67 has a head 68 in engagement with the endof the sleeve portion 65 of the sleeve member 64 and has a shank portion69 extending through the sleeve member 64 and beyond the collar portion66. Located axially on the shank portion 69 from the head 68 is aplurality of locking grooves 70 into which the collar portion 66 isswaged in the setting of the fastener 14. Axially adjacent to thelocking grooves 79 is a breakneck groove 71 at which the shank 69 of thepin 67 severs upon the attainment of a predetermined axial load. On theend of the shank portion 69 opposite from the head 68 is located aplurality of pull grooves 73.

In setting the fastener 1-1, the nose assembly 12 is moved proximate thefastener 14 and the shank 69 is inserted axially thereon. Note that theshank 69 of the pin 67 will extend through the bore 26 in the forwardportion 24 of the outer anvil member 20, through the bore 32 in the noseportion 30 of the collar ejector member 28, into the tapered bore 44 inthe collet member 40, and towards the front face of the chuck jawassembly (FIGURE 2). Upon axial movement of the collet member 40relative to the fastener 14, the chuck jaw assembly 4-6 engages theshank 69 of the pin 67 causing the chuck jaw assembly 46 to he movedaxially rearwardly against the compressive force of the spring member'60, causing the individual jaw members to be moved radially outwardly,permitting the insertion of the shank 6-9 of pin 67 into the aperturetherein. Note that the increased diameter or relieved portion 47 allowsthe jaw members of the chuck jaw assembly 46 to move radially outwardly.As this occurs, the plurality of teeth 54 on the chuck jaw assembly 46engage the pull grooves 73 on the shank 69.

Upon actuation of the pull gun 11, a relative axial force is appliedbetween the threaded portion 27 of the piston and the casing of the pullgun 1 1 and, hence, between the outer anvil 20 via the ears or lugs 22.As this axial force is increased, the head 68 of the pin 67 upsets theend of the sleeve portion 65, forming thereby a blind or bulbed head 72(FIGURE 3). With a further increase in axial force, the bore 26 of theouter anvil member 20 is moved over the collar portion 66, therebyswaging the collar portion 66 into the locking grooves 76 which are nowaxially coincident with the collar portion 66. Upon an increase in theaxial force, the swaging is completed and the shank 69 is severed at thebreakneck groove 71. The severed portion of the shank 69 is free to moveaxially rearwardly through the remaining structure of the nose assembly12 and out through a bore extending through the pull gun 11.

Upon further actuation of the pull gun 11, the piston (not shown) iscaused to move axially forwardly, thus moving the collet member 4!)axially forwardly until it engages the forward portion of the collarejector member 28. This movement continues, moving the nose portion 30into the bore 26 and into engagement with the now swaged collar portion66. At this time, a relative axial force is applied between the noseportion 30 and the outer anvil member 20, causing the outer anvil 20 tobe removed from the collar portion 66. With the outer anvil member 24}removed from the swaged collar portion 66, the collar ejector member 28is moved forward only until the front surface 34 of the collar ejector28 engages the rear surface 36 of the outer anvil member 20. Thus it canbe seen that the ejector member 28 serves the function of providing ameans whereby the outer anvil member 26 can be released from the swagedcollar portion 66.

be possible to insert the shank portion 69 of the pin 67 through thebore 26 at such an angle relative to the bore 44 of the collet member 40that upon forward movement of the collet member 40 the shank portion 69would be jammed between the outer anvil member 20 and the collet member4%, resulting in damage to the nose assembly 12.

Looking again to FIGURE 2, in practice the stroke of the pull gun 11 issuch that at the rearward end of the stroke thecollet member 46 would belocated axially rearwardly of the position as shown in FIGURE 2. Ofcourse, the position of the nose portion 30- of the collar ejector 28would remain unchanged, since further axial rearward movement isprevented by the stop member 25. Thus, assuming the absence of the stopmember 25 and assuming the ejector nose portion 30 to be anintegral partof the collet member 40, the shank 69 of the pin '67 could still beinserted at an angle relative to the. collet member 49 and the outeranvil member 20, thus resulting in damage to the nose assembly :12. Withthe construction as shown in FIGURE 2, even with the collet member 40 atits axially rearward extremity, it would be impossible to insert theshank 69 of the pin 67 angularly with respect to the collet member 40and the outer anvil member 20. The gap 38 is provided of an axial lengthrelative to the length of the nose portion 30 of the collar ejector 28such that the shank 69 of the pin 67 cannot be inserted between the noseportion 30' and the outer anvil member 20. In other words, then, thenose portion 30 is of such a preselected length relative to thepermissible axially rearward movement of the collar ejector member 28that even with the ejector member 28 in its axially rearwardmostposition, the nose portion 30 substantially radially blocks the aperture26 internally of the front or forward portion 24 to prevent angularinsertion of the pin 67. Thus, with the construction of the noseassembly 12, as shown in the drawings, insertion of the pin 67 of thefastener 14 angularly therein cannot occur and, thence, damage to thenose assembly 12 thereby is positively prevented.

Note, then, that in the construction as shown and described, the noseportion 30 of the collar ejector 28acts both as a means to remove theouter anvil member 29 from the swaged collar portion 66 and also servesto guide the shank 69 of the pin '67 into the nose assembly 12,

resultant of looking grooves therein and a tubular member adapted to befitted over the shank of the pin and swaged into the locking groovestherein, said apparatus comprising a generally tubularly shaped outeranvil member having an aperture through a forward portion thereof forswaging the tubular member to the pin, a generally tubularly shapedcollar ejector member axially movably disposed within said outer anvilmember and being movable axially rearwardly, said collar ejector memberhaving a tubular portion extending axially outwardly to a positionproximate to said forward portion to substantially radially blockpassage of said pin member between said forward portion and said tubularportion, chuck jaw means disposed within said outer anvil member forgrippingly engaging the pin of the fastener and movable axially independently of said collar ejector member, means for applying an axialforce relative to said chuck jaw means and said outer anvil member, andmeans operatively associated with said collar ejector member forlimiting the axially rearward movement of said collar ejector memberwithin said outer anvil member to said position.

2. Apparatus for applying a fastener which includes a pin member havinga head and .a shank with a plurality of locking grooves therein and atubular member adapted to be fitted over the shank of the pin and swagedinto the locking grooves therein, said apparatus comprising a generallytubularly shaped outer anvil member having an aperture through a forwardportion thereof for swaging the tubular member to the pin, a generallytubularly shaped collar ejector member disposed within said outer anvilmember and movable axially therein to a forward position and a rearposition, said collar ejector member having a tubular portion extendingaxially into said aperture in said outer anvil member for engagementwith the tubular member in accordance with movement of said collarejector member to said forward position, said tubular portion extendingaxially outwardly to a position proximate to said forward portion tosubstantially radially block passage of said pin member between saidforward portion and said tubular portion with said collar ejector memberin said rear position, chuck jaw means axially movably disposed withinsaid outer anvil memher for grippingly engaging the pin of the fastenerand being engageable with said collar ejector member for moving saidcollar ejector member toward said forward position responsively toaxially forward movement of said chuck jaw means, means for applying anaxial force relative to said chuck jaw means and said outer anvilmember, and means operatively associated with said collar ejector memberfor limiting the axially rearward movement of said collar ejector memberwithin said outer anvil member to said rear position.

3. Apparatus for applying a fastener which includes a pin member havinga head and a shank with a plurality of locking grooves therein and atubular member adapted to be fitted over the shank of the pin and swagedinto the locking grooves therein, said apparatus comprising a generallytubularly shaped outer anvil member having an aperture of a preselectedshape through a forward portion thereof for swaging the tubular memberto the pin, a generally tubularly shaped collar ejector member disposedwithin said outer anvil member and movable axially therein to a forwardposition and a rear position, said collar ejector member having atubular portion extending axially into said aperture in said outer anvilmember for engagement with the tubular member in accordance withmovement of said collar ejector member to said forward position, saidtubular portion extending axially outwardly to a position proximate tosaid forward portion to substanti ally radially block passage of saidpin member between said forward portion and said tubular portion withsaid collar ejector member in said rear position, chuck jaw meansaxially movably disposed Within said outer anvil member for grippinglyengaging the pin of the fas tener and being engageable with said collarejector member for moving said collar ejector member toward said forwardposition responsively to axially forward movement of said chuck jawmeans, means for applying an axially rearward force relative to saidchuck jaw means and said outer anvil member for setting the fastener andfor moving said aperture over the tubular member to sw-age the tubularmember to the pin and for applying an axially forward force relative tosaid chuck jaw means and said outer anvil member for moving said tubularportion of said collar ejector member into engagement with the tubularmember for removing the tubular member from said aperture, and a hollowsleeve disposed within said outer anvil member and engageable with saidcollar ejector member for limiting the axially rearward movement of saidcollar ejector member within said outer anvil member to said rearposition.

4. Apparatus for applying a fastener which includes a pin member havinga head and a shank with a plurality of locking grooves therein and atubular member adapted to be fitted over the shank of the pin and swagedinto the locking grooves therein, said apparatus comprising an outeranvil member having a forward portion with an aperture therethrough forswagin-g the tubular member to the pin, a collar ejector member movableaxially relative to said outer anvil member to a forward position and arear position, said collar ejector member having an axially outwardlyextending tubular portion movable axially within said aperture in saidouter anvil member for engagement with the tubular member, said tubularportion extending axially to a position proximate to said for-wardportion to substantially radially block passage of said pin memberbetween said forward portion and said tubular portion with said collarejector member in any axial position from said forward position to saidrear position, means for applying an axial force relative to the pin ofthe fastener and said outer anvil member, and a stop member associatedwith said outer anvil member for limiting the axially rearward movementof said collar ejector member to said rear position.

References Cited in the file of this patent UNITED STATES PATENTS2,531,049 Huck Nov. 21, 1950

1. APPARATUS FOR APPLYING A FASTENER WHICH INCLUDES A PIN MEMBER HAVINGA HEAD AND A SHANK WITH A PLURALITY OF LOCKING GROOVES THEREIN AND ATUBULAR MEMBER ADAPTED TO BE FITTED OVER THE SHANK OF THE PIN AND SWAGEDINTO THE LOCKING GROOVES THEREIN, SAID APARATUS COMPRISING A GENERALLYTUBULARLY SHAPED OUTER ANVIL MEMBER HAVING AN APERTURE THROUGH A FORWARDPORTION THEREOF FOR SWAGING THE TUBULAR MEMBER TO THE PIN, A GENERALLYTUBULARLY SHAPED COLLAR EJECTOR MEMBER AXIALLY MOVABLY DISPOSED WITHINSAID OUTER ANVIL MEMBER AND BEING MOVABLE AXIALLY REARWARDLY, SAIDCOLLAR EJECTOR MEMBER HAVING A TUBULAR PORTION EXTENDING AXIALLYOUTWARDLY TO A POSITION PROXIMATE TO SAID FORWARD PORTION OFSUBSTANTIALLY RADIALLY BLOCK PASSAGE OF SAID PIN MEMBER BETWEEN SAIDFORWARD PORTION AND SAID TUBULAR PORTION, CHUCK JAW MEANS DISPOSEDWITHIN SAID OUTER ANVIL MEMBER FOR GRIPPINGLY ENGAGING THE PIN OF THEFASTENER AND MOVABLE AXIALLY INDEPENDENTLY OF SAID COLLAR EJECTORMEMBER, MEANS FOR APPLYING AN AXIS FORCE RELATIVE TO SAID CHUCK JAWMEANS AND SAID OUTER ANVIL MEMBER, AND MEANS OPERATIVELY ASSOCIATED WITHSAID COLLAR EJECTOR MEMBER FOR LIMITING THE AXIALLY REARWARD MOVEMENT OFSAID COLLAR EJECTOR MEMBER WITHIN SAID OUTER ANVIL MEMBER TO SAIDPOSITION.